Spray foam and fiberglass are two common insulation materials, but it is important to look at how they stack up against each other. - http://www.dixiefoamllc.com/
11. Two pounds of
CLOSED-CELL SPRAY FOAM
has an R-value of 7.0,
whereas fiberglass only
has an R-value of 2.5.
12. FIBERGLASS
is significantly cheaper than
spray foam, but the lasting effects of
polyurethane foam insulation
can make it well worth
the investment.